MathDB
Area of CDEF

Source: LIMIT 2020 Cat 1 Obj P2

May 2, 2020
geometrylimit

Problem Statement

In a square ABCDABCD of side 22 units, EE is the midpoint of ADAD and FF on BEBE such that CFBECF\perp BE, then the quadrilateral CDEFCDEF has an area of
(A)22 (B)2.22.2 (C)5\sqrt{5} (D)None of these